brians74vette
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« on: April 29, 2010, 08:11:41 PM » |
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when my 74 sits which unfortunatley is a lot cause of my job and such, lucky it is in the garage, the battery drains, i heard it is a ground issue, should i replace the ground wire and check the ground area? right now i have a battery post disconnect. |
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C3 Corvette Forum 68 - 82
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« on: April 29, 2010, 08:11:41 PM » |
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imageblur
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« Reply #1 on: April 29, 2010, 08:52:04 PM » |
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I had the same problem with my 72. I changed where it was grounded and it fixed the problem. |
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vsquires
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« Reply #2 on: April 30, 2010, 07:48:46 PM » |
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where did you change the ground to? |
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C3 Corvette Forum 68 - 82
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« Reply #2 on: April 30, 2010, 07:48:46 PM » |
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imageblur
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« Reply #3 on: May 02, 2010, 09:27:25 AM » |
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If I remember correctly, it was to the engine block |
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vmiester
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« Reply #4 on: May 06, 2010, 05:27:46 PM » |
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Hi ,I sent you an E-mail on battery drain.Tried to post it on here,but no luck.Hope it is of some help.Rick |
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Rick
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Palmbeachvette
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« Reply #5 on: May 06, 2010, 06:03:50 PM » |
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My 76 has two ground cables, first from the battery to the frame then a second from the frame to the right side motor mount bolt. It was this way when I bought the car. You can always remove the ground cable starting at the battery and clean it with a wire brush then move to every other place the ground cables connect since most ground problems are corrosion related, also do the same to the positive battery connection, if you haven't already done so. I would be inclined to have the battery tested since you may have a weak cell, even if the battery is new, also look for things that can or do pull power all the time even if very small could drain a battery that isn't strong enough. My car came with a fairly new battery but the reserve capacity would only last half an hour if I was lucky, I replaced it with a larger size and higher reserve capacity and now I can work with the doors open and not have to recharge the battery. I switched from the standard 75 series battery to a 78 series and I'm glad I did. Good luck and keep us posted with your results. Eric |
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anmracing
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« Reply #6 on: June 29, 2010, 08:01:50 AM » |
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Also keep in mind it is best to have as short a ground as possible. Like Eric said, put a ground from the block to the frame then a cable to the battery to the frame for the best results. Those darn clocks seem to wreak havoc too. Check to see if that is part of the problem. Sometime the ignition will be partially on accesory too. That could drain the battery like no other... A~ BTW- Also the battery might have a bad cell. If that is the case then that is the easy fix.......... |
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kenyradios
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« Reply #7 on: June 30, 2010, 07:34:35 AM » |
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Had this problem on my 77. Cleaned the ground cable then replaced the battery. Noticed that the positive cable was not original and replaced that. Problem solved but if the car sits a really long time it still ewill drain down some. Ibought a battery tender and past year ,no matter how long it sits will start on first turn fully charged. |
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wzschirnt
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« Reply #8 on: July 01, 2010, 01:47:18 PM » |
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Hey, The voltage regulator in the alternator can short out causing a slow drain also. Shut the key off and take off the big red wire on the alternator. Check for voltage between the red wire and the pole on the alternator - should be very little (milliamps) or none. Good luck. |
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Gideonsword
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« Reply #9 on: March 27, 2011, 11:51:25 PM » |
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Gentlemen, you are probably correct when you say it is likely a corroded ground connection, but don't overlook some the aftermarket stereo's and clocks. A lot of the recent years stereo's have a constant voltage drain to keep their internal "clock" and memory for station settings. I replaced the stereo in my "other" car a while back, and it hasn't drained the battery since! |
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Gideonsword
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C3 Corvette Forum 68 - 82
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